diff --git a/.changeset/pre.json b/.changeset/pre.json
index 97962fa8e7a..ba0a83ecf37 100644
--- a/.changeset/pre.json
+++ b/.changeset/pre.json
@@ -6,8 +6,11 @@
   },
   "changesets": [
     "beige-geese-wink",
+    "breezy-spiders-tap",
+    "good-experts-repair",
     "shaggy-ears-scream",
     "sour-sheep-walk",
+    "strong-terms-perform",
     "yellow-flies-repeat"
   ]
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8a3c2bcc7ab..f15a55ef9cb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,89 @@
 # @apollo/client
 
+## 3.9.0-alpha.3
+
+### Minor Changes
+
+- [#11301](https://github.com/apollographql/apollo-client/pull/11301) [`46ab032af`](https://github.com/apollographql/apollo-client/commit/46ab032af83a01f184bfcce5edba4b55dbb2962a) Thanks [@alessbell](https://github.com/alessbell)! - Add multipart subscription network adapters for Relay and urql
+
+  ### Relay
+
+  ```tsx
+  import { createFetchMultipartSubscription } from "@apollo/client/utilities/subscriptions/relay";
+  import { Environment, Network, RecordSource, Store } from "relay-runtime";
+
+  const fetchMultipartSubs = createFetchMultipartSubscription(
+    "http://localhost:4000"
+  );
+
+  const network = Network.create(fetchQuery, fetchMultipartSubs);
+
+  export const RelayEnvironment = new Environment({
+    network,
+    store: new Store(new RecordSource()),
+  });
+  ```
+
+  ### Urql
+
+  ```tsx
+  import { createFetchMultipartSubscription } from "@apollo/client/utilities/subscriptions/urql";
+  import { Client, fetchExchange, subscriptionExchange } from "@urql/core";
+
+  const url = "http://localhost:4000";
+
+  const multipartSubscriptionForwarder = createFetchMultipartSubscription(url);
+
+  const client = new Client({
+    url,
+    exchanges: [
+      fetchExchange,
+      subscriptionExchange({
+        forwardSubscription: multipartSubscriptionForwarder,
+      }),
+    ],
+  });
+  ```
+
+### Patch Changes
+
+- [#11275](https://github.com/apollographql/apollo-client/pull/11275) [`3862f9ba9`](https://github.com/apollographql/apollo-client/commit/3862f9ba9086394c4cf4c2ecd99e8e0f6cf44885) Thanks [@phryneas](https://github.com/phryneas)! - Add a `defaultContext` option and property on `ApolloClient`, e.g. for keeping track of changing auth tokens or dependency injection.
+
+  This can be used e.g. in authentication scenarios, where a new token might be
+  generated outside of the link chain and should passed into the link chain.
+
+  ```js
+  import { ApolloClient, createHttpLink, InMemoryCache } from "@apollo/client";
+  import { setContext } from "@apollo/client/link/context";
+
+  const httpLink = createHttpLink({
+    uri: "/graphql",
+  });
+
+  const authLink = setContext((_, { headers, token }) => {
+    return {
+      headers: {
+        ...headers,
+        authorization: token ? `Bearer ${token}` : "",
+      },
+    };
+  });
+
+  const client = new ApolloClient({
+    link: authLink.concat(httpLink),
+    cache: new InMemoryCache(),
+  });
+
+  // somewhere else in your application
+  function onNewToken(newToken) {
+    // token can now be changed for future requests without need for a global
+    // variable, scoped ref or recreating the client
+    client.defaultContext.token = newToken;
+  }
+  ```
+
+- [#11297](https://github.com/apollographql/apollo-client/pull/11297) [`c8c76a522`](https://github.com/apollographql/apollo-client/commit/c8c76a522e593de0d06cff73fde2d9e88152bed6) Thanks [@jerelmiller](https://github.com/jerelmiller)! - Add an explicit return type for the `useReadQuery` hook called `UseReadQueryResult`. Previously the return type of this hook was inferred from the return value.
+
 ## 3.9.0-alpha.2
 
 ### Patch Changes
diff --git a/package-lock.json b/package-lock.json
index c03bfde63f7..e80382241a3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@apollo/client",
-  "version": "3.9.0-alpha.2",
+  "version": "3.9.0-alpha.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@apollo/client",
-      "version": "3.9.0-alpha.2",
+      "version": "3.9.0-alpha.3",
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index ed22fbaab9d..d355f3076f9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@apollo/client",
-  "version": "3.9.0-alpha.2",
+  "version": "3.9.0-alpha.3",
   "description": "A fully-featured caching GraphQL client.",
   "private": true,
   "keywords": [